unomagnmus

This may not apply but I was visiting my son in Seattle and purchased a Snake ( nylon with both an eye and a battery powered light). You could remove the eye and replace it with a small battery and the red bulb. I ran over 150 ft of Romex over ceilings and thru walls with it. Boy you also see the red light to make sure you went in the right direction. I have tried for 3 years to get a replacement of the snake, so far I have not found it again!!!!

I would use those Plaster washers instead, larger in size and work better on my house with 100+ year old ceilings. This is usually a problem caused when the plaster has lost its key. I have lifted a ceiling up over 1" and then taped. It is no fun to remove 1.5" of old plaster on wood laths.